Virginia's Declaration of Rights was drawn upon by Thomas Jefferson for the opening paragraphs of the Declaration of Independence. It was widely copied by the other colonies and became the basis of the Bill of Rights.
The ridges found in flexible metal duct create turbulence and will diminish airflow. NEVER use 4 dryer duct or any plastic duct on a range hood installation. The minimum size duct allowed on most range hoods is 3 Â¼ by 10 which is equivalent to 6 round. More powerful hoods require even larger duct sizes up to 10 round. Consult the specifications for the model you have chosen.
If the hood is not ducted to the outside, it's referred to as a ductless range hood or recirculating range hood. Most full-size range hoods can be either ducted to the outside or ductless (sometimes called convertible), whereas quite a lot of undercabinet and microwave range hoods can only be ductless. All Futuro Futuro range hoods (including customizable models such as the Insert/Liner) can be used in ducted or ductless mode.